physics speed/orbit question, please help :)

Question

Consider a planet with a mass of 2.9 x 1024 kg. We want to put a satellite in orbit with an orbital radius of 5.7 x 106 meters. At what speed should the satellite go to have a perfectly circular orbit?

Give your answer ... in terms of m/s, to a precision of integer m/s. Use a format like #### in your answer.

Answer 1

try:

v²=(G*M/R)

solve for v.